Malicious PDF — malware analysis report

Static analysis result for SHA-256 3debcda86a43eaef…

MALICIOUS

PDF

84.8 KB Created: 2021-09-13 19:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 872c50d374ff5b762a1b6f9aede3abbd SHA-1: f585af53093c68bc9f1bd970ea6abeac3d7777db SHA-256: 3debcda86a43eaefc42a09fb0161c3ed1ec437f962f1882bc21d402a73c7e2f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, a common technique for distributing phishing lures or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and trojan activity. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326f21ce0da---72715689246.pdf In PDF document text
    • http://jawarakreasi.com/file/semujutudetubaxose.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/wavateladuparobes.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/muvizogi.pdfIn PDF document text
    • http://cochemical.com/upload/files/65708017178.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/24942118130.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/verijefazebejodenulita.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/zijuguf.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318eaea054f---tumufuwibaf.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/68693464948.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/fevegex.pdfIn PDF document text
    • https://brod-plovdiv.com/images/kelotapepuwufukevod.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/29037017731.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/5083152950.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/82369661125.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/84141594080.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613538754ff7e---zutorimuganakajufuvupi.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/10051539359.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/92774892785.pdfIn PDF document text
    • https://kueapem.com/contents/files/65725296552.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16133b95fd8e41---gojakagebixevitene.pdfIn PDF document text
    • http://pi-consulting.ch/download/9034223395.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/27531534092.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109071230171523.pdfIn PDF document text
    • http://novafish.it/userfiles/files/pojamegekofonofuranot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=papa+louie+2+download+for+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 17988 bytes
SHA-256: cb7462f368413efab2721730baef3df752f51b04a6ed6d8e18c46c31c6847eee
font_01_sfnt_off00011599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 10532 bytes
SHA-256: 538c0051b12871ec7c2fb282bbb0d3a181cd318273b91ad205a1e822388e7673
font_02_sfnt_off00012dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1